YD/T 6678-20265G mobile telecommunication network - Technical requirements for network functions restoration procedure of core network (English PDF)

YD/T 6678-2026 is the English-translated version of 5G移动通信网 核心网网络功能故障恢复流程技术要求.

The document sets out the technical requirements for the restoration procedures that follow a network function failure in the core network of a 5G mobile communication network. It covers the restoration procedures related to the N4 interface, the N3/N9 interfaces and the service-based interfaces.

It applies to situations in which a 5G core network function fails, and describes how the network functions concerned recover by following the prescribed procedures. Core network equipment vendors, mobile operators and test laboratories use it when designing and checking failure recovery behavior. YD/T 6678-2026 is a voluntary standard approved by the Ministry of Industry and Information Technology. It was issued on 11 March 2026 and takes effect on 1 June 2026. It is a new standard.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 30 pages — is available in the English PDF.

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